/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Operations/MeshPlaneCut.h
Fill cut loops withFPlanarHoleFiller, using a caller-provided triangulation function
virtual bool HoleFill ( [TFunction](API\Runtime\Core\GenericPlatform\TFunction)< [TArray](API\Runtime\Core\Containers\TArray)< [FIndex3i](API\Runtime\GeometryCore\FIndex3i) >(const [FGeneralPolygon2d](API\Runtime\GeometryCore\Curve\FGeneralPolygon2d) &)> PlanarTriangulationFunc, bool bFillSpans, int ConstantGroupID )